Electrical characteristics (continued) – Rainbow Electronics MAX4981 User Manual
Page 3
MAX4978–MAX4981
Overvoltage Protector with
Active Current Limit
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 5.0V, V
EN
= 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Thermal-Shutdown Hysteresis
10
°C
EN Input High Voltage
V
IH
1.5
V
EN Input Low Voltage
V
IL
0.6
V
EN Input Leakage Current
I
LKGE
V
EN
= 5.5V or 0V
-1
+1
µA
SDT Output Low Voltage
V
OL
MAX4978/MAX4979, I
SINK
= 20mA
1
V
SDT Leakage Current
I
LKGS
MAX4978/MAX4979, V
SDT
= 28V,
SDT
deasserted
1
µA
DYNAMIC (Note 3)
IN Debounce Time
t
DEB
V
UVLO
< V
IN
< V
OVLO
to charge-pump
enable, Figure 1
120
160
200
ms
Switch Turn-On Time
t
ON
Time from V
OUT
= 10% of V
IN
to V
OUT
= 90%
of V
IN
, R
L
= 10
Ω, C
L
= 10µF
1.5
ms
Switch Turn-Off Time
t
OFF
V
IN
< V
UVLO
or V
IN
> V
OVLO
to internal
switch off, R
L
= 1k
Ω
5
15
µs
Current-Limit Blanking Time
t
BLANK
Short circuit applied, Figure 1
15
20
25
ms
Current-Limit Reaction Time
t
REAC
Short circuit applied
5
µs
Overcurrent Autoretry Time
t
RETRY
Figure 1
120
160
200
ms
Note 2: All devices are 100% production tested at T
A
= +25°C. Specifications over -40°C to +85°C are guaranteed by design.
Note 3: All timing is measured using 10% and 90% levels, unless otherwise noted.